Steam-boiler attachment



(No Model.) 2 Sheets-Sheet 1.

O. K. PIGKLES 8v J. O'BRIEN. STEAM BOILER ATTACHMENT.

No. 477,152. Patented June 14, 1892.

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STEAM BOILER ATTACHMENT.

No. 477,152. Patented June 14, 1892.

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UNITED STATES PATENT OF ICE.

CHARLES K. PICKLES AND JOHN OBRIEN, OF ST. LOUIS, MISSOURI.

STEAM-BOILER ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 477,152, dated June 14,1892. Application filed January 15, 1892. Serial No. 418,1d9. (N model.)

To all whom, it may concern:

Be it known that we, CHARLES K. PICKLES and JOHN OBRIEN, both of thecity of St. Louis, in the State of Missouri, have invented a certain newand useful Improvement in Steam-Boiler Attachments, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification.

Our invention relates to certain improvements in that class of boilerswhich have a downdraft and in which the grate-bars are composed ofwater-tubes; and our invention consists in features of noveltyhereinafter fully described, and pointed out in the claims.

Figure I is a vertical section illustrative of our invention, thesection being taken on line I I, Fig. III. Fig. II is a similar viewtaken on line II II, Fig. III. Fig. III is a vertical longitudinalsection taken on line III III, Fig. I. Fig. IV is an enlarged detailsection illustrating the manner of securing the watertubes forming thegrate-bars in place.

Referring to the drawings,1 represents the boiler proper, and 2 thesetting.

3 represents the m ud-dru m, connected by a vertical pipe or pipes 4with the inner end of the boiler.

5 represents the fire-box the grate of which is composed of a number ofwater-pipes 6, connected at their ends to manifolds or large pipes 7,which are connected to the boiler by Vertical pipes 8, communicatingwith the ends of the manifolds, as shown in Figs. I and II.

represents the ash-pit, the bottom of which is composed of a grateformed of a number of water-tubes 21, connected at their ends bymanifolds or large pipes 22, with the ends of which communicate verticalpipes 8, which form lower extensions of the pipes 8 and form acommunication with the pipes 8 between the manifolds 22 and the boilerl.

23 represents a sub-ash-pitbeneath the water-tubes21,as shown in Fig.III. Asameans of connecting the pipes 6 and 21 to the manifolds 7 and 22we have shown in Fig. IV a threaded end on the inner portion of thewater-tubes, which screws into the inner manifolds, and 011 the outerends of the watertubes are fitted nuts or sleeves 24, which have a tightfit upon the water-tubes and which screw into the front manifolds.

25 represents a wall extending all the way across the furnace betweenthe boiler 1 and the upper inner manifold 7, so as to shut off the draftover the manifold and force the air entering the fire-box over the fuelto pass in a downward direction through the fuel and through the grate 6and pass through a space 26 between the upper inner manifold 7 and thebridge-wall 27 of the furnace, as indicated by the arrows in Fig. III.

The air entering the sub-ash-pit 23 passes in an upward directionthrough the grate 21 and out through the space 26, as shown by thearrows in Fig. III.

Any fuel falling through the grate 0 will be caught by the grate 21 andwill there be consumed, combustion being supplied by an upward draft,while combustion in the firebox is supplied by a downward draft,effecting a thorough combustion of the gases.

The mud-drum 3 communicates with the lower front manifold 22 through apipe or pipes 9, the ends 10 of which extend up some distance into themud-drum, as shown in Fig. III, so as to take the water from the drumabove the line of the mud which may settle in the drum.

11 represents a deflecting plate or diaphragm, which extends in adiagonal direction from the inner side of the opening 2, between thedrum and the pipe 4, downwardly to a point beneath the open end of thepart 10 of pipe 9, its lower end being behind the part 10 of the pipe,so that the mud falling through the pipe 4 and settling in the receivingside of the drum 3 will be deflected be neath the open end of the part10 of the pipe, and thus not be liable to enter the pipe.

13 represents the pipe through which water is fed to the boiler, thispipe communicating with the drum 3.

A boiler thus constructed is effectual in its operation and can bequickly and easily applied and repaired, and alfords a facility for thecirculation of water through the tubes in the direction in which it willmost readily pass during the different stages and conditions of heat inthe fire-box and the temperature of the water which may exist.

\Ve claim as our iuvention- 1. In an attachment for steam-boilers, thecombination of an upper and lower pair of manifolds communicating withthe boiler at their opposite ends, water-tubes extending between theupper pair of manifolds and forming an upper grate, water-tubes extend-5 ing between the lower pair of manifolds and forming a lower grate, aWall extending across the furnace between the upper inner manifold andboiler, a suitable bridge-wall, suitable drafts above the upper grateand below the lower grate, and an unobstructed passage between the rearmanifolds, whereby there will be a downdraft through the upper grate andan updraft through'the lower grate, substantially as and for the purposeherein set forth.

2. In an attachment for steam-boilers, the combination of an upper andlower pair of

